@ng-bootstrap/ng-bootstrap
Version:
Angular powered Bootstrap
95 lines • 15.2 kB
JavaScript
import { Observable, merge } from 'rxjs';
import { share, filter, delay, map } from 'rxjs/operators';
export class Trigger {
constructor(open, close) {
this.open = open;
this.close = close;
if (!close) {
this.close = open;
}
}
isManual() {
return this.open === 'manual' || this.close === 'manual';
}
}
const DEFAULT_ALIASES = {
hover: ['mouseenter', 'mouseleave'],
focus: ['focusin', 'focusout'],
};
export function parseTriggers(triggers, aliases = DEFAULT_ALIASES) {
const trimmedTriggers = (triggers || '').trim();
if (trimmedTriggers.length === 0) {
return [];
}
const parsedTriggers = trimmedTriggers
.split(/\s+/)
.map((trigger) => trigger.split(':'))
.map((triggerPair) => {
let alias = aliases[triggerPair[0]] || triggerPair;
return new Trigger(alias[0], alias[1]);
});
const manualTriggers = parsedTriggers.filter((triggerPair) => triggerPair.isManual());
if (manualTriggers.length > 1) {
throw 'Triggers parse error: only one manual trigger is allowed';
}
if (manualTriggers.length === 1 && parsedTriggers.length > 1) {
throw "Triggers parse error: manual trigger can't be mixed with other triggers";
}
return parsedTriggers;
}
export function observeTriggers(renderer, nativeElement, triggers, isOpenedFn) {
return new Observable((subscriber) => {
const listeners = [];
const openFn = () => subscriber.next(true);
const closeFn = () => subscriber.next(false);
const toggleFn = () => subscriber.next(!isOpenedFn());
triggers.forEach((trigger) => {
if (trigger.open === trigger.close) {
listeners.push(renderer.listen(nativeElement, trigger.open, toggleFn));
}
else {
listeners.push(renderer.listen(nativeElement, trigger.open, openFn), renderer.listen(nativeElement, trigger.close, closeFn));
}
});
return () => {
listeners.forEach((unsubscribeFn) => unsubscribeFn());
};
});
}
const delayOrNoop = (time) => (time > 0 ? delay(time) : (a) => a);
export function triggerDelay(openDelay, closeDelay, isOpenedFn) {
return (input$) => {
let pending = null;
const filteredInput$ = input$.pipe(map((open) => ({ open })), filter((event) => {
const currentlyOpen = isOpenedFn();
if (currentlyOpen !== event.open && (!pending || pending.open === currentlyOpen)) {
pending = event;
return true;
}
if (pending && pending.open !== event.open) {
pending = null;
}
return false;
}), share());
const delayedOpen$ = filteredInput$.pipe(filter((event) => event.open), delayOrNoop(openDelay));
const delayedClose$ = filteredInput$.pipe(filter((event) => !event.open), delayOrNoop(closeDelay));
return merge(delayedOpen$, delayedClose$).pipe(filter((event) => {
if (event === pending) {
pending = null;
return event.open !== isOpenedFn();
}
return false;
}), map((event) => event.open));
};
}
export function listenToTriggers(renderer, nativeElement, triggers, isOpenedFn, openFn, closeFn, openDelay = 0, closeDelay = 0) {
const parsedTriggers = parseTriggers(triggers);
if (parsedTriggers.length === 1 && parsedTriggers[0].isManual()) {
return () => { };
}
const subscription = observeTriggers(renderer, nativeElement, parsedTriggers, isOpenedFn)
.pipe(triggerDelay(openDelay, closeDelay, isOpenedFn))
.subscribe((open) => (open ? openFn() : closeFn()));
return () => subscription.unsubscribe();
}
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{ Observable, merge } from 'rxjs';\nimport { share, filter, delay, map } from 'rxjs/operators';\nimport { Renderer2 } from '@angular/core';\n\nexport class Trigger {\n\tconstructor(public open: string, public close?: string) {\n\t\tif (!close) {\n\t\t\tthis.close = open;\n\t\t}\n\t}\n\n\tisManual() {\n\t\treturn this.open === 'manual' || this.close === 'manual';\n\t}\n}\n\nconst DEFAULT_ALIASES = {\n\thover: ['mouseenter', 'mouseleave'],\n\tfocus: ['focusin', 'focusout'],\n};\n\nexport function parseTriggers(triggers: string, aliases = DEFAULT_ALIASES): Trigger[] {\n\tconst trimmedTriggers = (triggers || '').trim();\n\n\tif (trimmedTriggers.length === 0) {\n\t\treturn [];\n\t}\n\n\tconst parsedTriggers = trimmedTriggers\n\t\t.split(/\\s+/)\n\t\t.map((trigger) => trigger.split(':'))\n\t\t.map((triggerPair) => {\n\t\t\tlet alias = aliases[triggerPair[0]] || triggerPair;\n\t\t\treturn new Trigger(alias[0], alias[1]);\n\t\t});\n\n\tconst manualTriggers = parsedTriggers.filter((triggerPair) => triggerPair.isManual());\n\n\tif (manualTriggers.length > 1) {\n\t\tthrow 'Triggers parse error: only one manual trigger is allowed';\n\t}\n\n\tif (manualTriggers.length === 1 && parsedTriggers.length > 1) {\n\t\tthrow \"Triggers parse error: manual trigger can't be mixed with other triggers\";\n\t}\n\n\treturn parsedTriggers;\n}\n\nexport function observeTriggers(\n\trenderer: Renderer2,\n\tnativeElement: HTMLElement,\n\ttriggers: Trigger[],\n\tisOpenedFn: () => boolean,\n) {\n\treturn new Observable<boolean>((subscriber) => {\n\t\tconst listeners: (() => void)[] = [];\n\t\tconst openFn = () => subscriber.next(true);\n\t\tconst closeFn = () => subscriber.next(false);\n\t\tconst toggleFn = () => subscriber.next(!isOpenedFn());\n\n\t\ttriggers.forEach((trigger: Trigger) => {\n\t\t\tif (trigger.open === trigger.close) {\n\t\t\t\tlisteners.push(renderer.listen(nativeElement, trigger.open, toggleFn));\n\t\t\t} else {\n\t\t\t\tlisteners.push(\n\t\t\t\t\trenderer.listen(nativeElement, trigger.open, openFn),\n\t\t\t\t\trenderer.listen(nativeElement, trigger.close!, closeFn),\n\t\t\t\t);\n\t\t\t}\n\t\t});\n\n\t\treturn () => {\n\t\t\tlisteners.forEach((unsubscribeFn) => unsubscribeFn());\n\t\t};\n\t});\n}\n\nconst delayOrNoop = <T>(time: number) => (time > 0 ? delay<T>(time) : (a: Observable<T>) => a);\n\nexport function triggerDelay(openDelay: number, closeDelay: number, isOpenedFn: () => boolean) {\n\treturn (input$: Observable<boolean>) => {\n\t\tlet pending: { open: boolean } | null = null;\n\t\tconst filteredInput$ = input$.pipe(\n\t\t\tmap((open) => ({ open })),\n\t\t\tfilter((event) => {\n\t\t\t\tconst currentlyOpen = isOpenedFn();\n\t\t\t\tif (currentlyOpen !== event.open && (!pending || pending.open === currentlyOpen)) {\n\t\t\t\t\tpending = event;\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t\tif (pending && pending.open !== event.open) {\n\t\t\t\t\tpending = null;\n\t\t\t\t}\n\t\t\t\treturn false;\n\t\t\t}),\n\t\t\tshare(),\n\t\t);\n\t\tconst delayedOpen$ = filteredInput$.pipe(\n\t\t\tfilter((event) => event.open),\n\t\t\tdelayOrNoop(openDelay),\n\t\t);\n\t\tconst delayedClose$ = filteredInput$.pipe(\n\t\t\tfilter((event) => !event.open),\n\t\t\tdelayOrNoop(closeDelay),\n\t\t);\n\t\treturn merge(delayedOpen$, delayedClose$).pipe(\n\t\t\tfilter((event) => {\n\t\t\t\tif (event === pending) {\n\t\t\t\t\tpending = null;\n\t\t\t\t\treturn event.open !== isOpenedFn();\n\t\t\t\t}\n\t\t\t\treturn false;\n\t\t\t}),\n\t\t\tmap((event) => event.open),\n\t\t);\n\t};\n}\n\nexport function listenToTriggers(\n\trenderer: Renderer2,\n\tnativeElement: HTMLElement,\n\ttriggers: string,\n\tisOpenedFn: () => boolean,\n\topenFn: () => void,\n\tcloseFn: () => void,\n\topenDelay = 0,\n\tcloseDelay = 0,\n) {\n\tconst parsedTriggers = parseTriggers(triggers);\n\n\tif (parsedTriggers.length === 1 && parsedTriggers[0].isManual()) {\n\t\treturn () => {};\n\t}\n\n\tconst subscription = observeTriggers(renderer, nativeElement, parsedTriggers, isOpenedFn)\n\t\t.pipe(triggerDelay(openDelay, closeDelay, isOpenedFn))\n\t\t.subscribe((open) => (open ? openFn() : closeFn()));\n\n\treturn () => subscription.unsubscribe();\n}\n"]}